Occasional income is a one-off, incidental earning that an individual makes outside of business — for example, helping out now and then, mowing a neighbour’s lawn or selling surplus produce from the garden. Both Slovakia and the Czech Republic exempt such income up to a set limit, but the rules differ sharply: Slovakia uses a combined €500 threshold and taxes only the excess, while the Czech Republic uses a CZK 50,000 limit where exceeding it makes the whole amount taxable.
What counts as occasional income
In both countries, occasional income is defined by its incidental, non-recurring nature. It is not an activity you carry out systematically and with the intention of making a profit — that would be business. Typical examples include a one-time job, occasional help for a fee or selling surplus from your own garden. In Slovakia it falls under Section 8(1)(a) of the Income Tax Act (Act No. 595/2003 Coll.), in the Czech Republic under Section 10(1)(a) of Act No. 586/1992 Coll.
In both jurisdictions there is also an important anti-abuse rule: income is not treated as occasional if it is earned under a contractual relationship and the paying business claims it as a tax-deductible expense. Occasional income is meant for genuinely incidental earnings, not for disguised fees paid by a company.
The Slovak rule: a combined €500 exemption
Under Section 9(1)(g) of the Slovak Income Tax Act, the combined total of occasional income and income from the rental of immovable property (Section 6(3)) is exempt up to €500 per tax period. Crucially, if the total exceeds €500, only the amount above €500 is taxed, not the whole sum.
Example: earn €450 occasionally and the whole amount is exempt; earn €900 and you exempt €500 and tax only €400. The €500 limit is shared between rental and occasional income, and the taxpayer decides how to split it. Where the taxable part is concerned, proven expenses may be claimed, but only proportionally to the taxed share.
The Czech rule: a CZK 50,000 all-or-nothing limit
Under Section 10(3)(a) of the Czech Income Tax Act, occasional income is exempt if its total for the tax period does not exceed CZK 50,000. For 2026 this threshold also applies to occasional gratuitous income. The decisive difference is that the Czech limit is an all-or-nothing threshold: if the total exceeds CZK 50,000, the exemption is lost entirely and the whole amount becomes taxable, not just the part above the limit.
Example: CZK 49,000 of occasional income is fully exempt, but CZK 51,000 means the entire CZK 51,000 is taxed as other income under Section 10. Proven expenses incurred to earn the income may be deducted, but they cannot exceed the income — no tax loss can arise from occasional income.
Where the two systems differ most
The headline difference is the mechanics of the limit. Slovakia taxes only the excess over €500, so crossing the line has a gradual effect. The Czech Republic taxes the entire amount once CZK 50,000 is exceeded, so a few hundred crowns over the line can trigger tax on everything. A second difference concerns rental: in Slovakia rental of immovable property shares the €500 exemption, whereas in the Czech Republic rental of real estate falls under Section 9 and is outside the occasional-income exemption entirely — only occasional rental of movable property belongs under Section 10.
For anyone earning on both sides of the border, these differences matter when planning incidental earnings, because the same gross amount can be treated very differently depending on which country’s rules apply.
When occasional income becomes a business
In both countries the dividing line is not the amount but the regularity and intent. Selling garden surplus once a year is occasional income; selling produce at the market every weekend is a business requiring a trade licence. Once the activity becomes systematic and profit-driven, the exemption no longer applies and the income is subject to social and health contributions as self-employment.
Keeping even a simple record — the date, amount and a short description of each small earning — helps you demonstrate during an audit that the income was genuinely occasional rather than a hidden business activity.
How it is reported and whether contributions apply
If the income stays within the exemption limit and you have no other reason to file, no tax return is needed in either country. If you exceed the limit, you report the income as other income (Section 8 in Slovakia, Section 10 in the Czech Republic) and apply any allowable expenses. In the Czech Republic no social or health insurance is paid on occasional income under Section 10. In Slovakia no social insurance applies, but the taxable part of other income can enter the annual health-insurance settlement, so a top-up may arise.
In short, the concept is shared but the numbers and the mechanics are not — which is exactly why the exempt amount from one country should never be applied to the other.
Not sure whether your earnings still qualify as occasional income, or whether you already need a trade licence in Slovakia or the Czech Republic? We will gladly assess your situation and set it up so you do not pay unnecessary tax or contributions.
FAQ
What is the exemption limit for occasional income in Slovakia and Czechia?
In Slovakia the combined exemption for occasional income and rental of immovable property is €500 per year, and only the amount above €500 is taxed. In the Czech Republic occasional income is exempt up to CZK 50,000 per year, but if that total is exceeded the whole amount becomes taxable. The two limits are not interchangeable and apply strictly within their own jurisdiction.
Why does exceeding the Czech limit tax the whole amount?
The Czech CZK 50,000 threshold is an all-or-nothing limit under Section 10(3)(a). As long as the total occasional income stays at or below CZK 50,000 it is fully exempt; once it exceeds the limit, the exemption is lost and the entire amount is taxed as other income. This differs from the Slovak system, where only the part above €500 is taxed, making the Czech rule more sensitive near the threshold.
Do I pay social or health contributions on occasional income?
In the Czech Republic no social or health insurance is paid on occasional income under Section 10. In Slovakia no social insurance applies either, but the taxable portion of other income can enter the annual health-insurance settlement, so a health-contribution top-up may arise. If the activity becomes regular and profit-driven, it is treated as business in both countries, with full contributions.